Condensing apparatus.



(1A.. PARSONS & s. s. COOK.

- connnusmd APPARATUS. APPLIGATIONIILED OGT.21, 1911.

Patented'Feb. 25,1913.

2 SHEETSSHEBT 1.

Fig.1. 1%

G. A. PARSONS & S. S. 000K.

GONDENSING APPARATUS. AEPILIOATION P1111111 001.21, 1911.

2 sums-$112111? 2.

11 l i L 5 WITNESSES ings Jigure 1 is a sectional elevation of i 'rangement CHARLES ALGERNON PARSONS, 0F NEWGASTLE-UPON-TYNE, AND STANLEY SMITH COOK, 0F WALLSEND, ENGLAIJD; sen) CDOK ASSIGNQR T0 SAID PARSONS.

CONDENBING APPARATUS.

I Specification of Letters Patent.

Patented Feb. 25.

Application filed Butcher 21, 1911. Se ial No. 656,067.

To all whom it may concern:

Be it known that we, Gr-ignnns ALGERNON PARSONS, K. C. 13., a subject of the King of Great Britain and Ireland, and residing at I Heaton 'VVork-s, Newcastle upon Tyne, in

the tollowing is a specification.

This invention relates to improvements in condensing plant of the typeused for obtaining very high degrees of vacuum as in the exhaust chamber of turbines, steam engines and the like. Such condensing plants are usually provided with augmentor means arranged to increase the vacuum produced in the main condenser by the wet air pumps or other ordinary'means,'tl1e latter being placed at a lower levelthan'the chamber to be exhausted so as to drain. away any fluid which may condense therein. F or the sake of economy in space, this difierence in levels has been reduced to as great an extent as is possible consequent upon-proper drainage being obtained, but it is found that under such conditions an increased degree ,of vacuum in the condenser and in the exhaust chamber causes the condensed .fllllfl to rise to an undesirable height in the exhaust chamber by means of the drainage passages. For instance in the case of a turbine this condensed fluid rises so as to come into contact with the blades. 1

The object of the present invention is overcome this dilliculty.

The invention consists for this purpose in providing a connection between the augmentor suction and the suction pipe oi the ordinary exhausting means, to prevent the' fluid rising to more than a predetermined height above the inlet to the ordinary ex-..

hausting means. The invention also. consists in the improved condensing plant as h reinafter described. s

- Refer'1'i11g now to-the accompanying drawa vapor condensing plant arranged according to the present invention; Fig. 2 showsin sectional elevation a part of another ar- Fig. 3 is a sectional elevation of another,

form of a condenser plant according to the present invention, while Fig. l 1s a part sectional elevation of another arrangement similarto that shown in Fig. 3.

One method of carrying the invention into effect is shown as applied to a condensing plant illustrated. in Fig. l, in which the exhaust chamber, a, of the turbine, 72, is connected'by means of a pipe, c, to a condenser,

(Z, of any type, the Water of condensation in V the condenser, (Z, being withdrawn through a pipe, 0, which leads to one or more wet air pumps, f, the foot valves only of which are shown. As is customary in condensing plants for turbine machinery, the degree oi: vacuum in the main condenser, d, is further increased by any suitable means such as that shown, which comprises an ejector nozzle, g, the steam issuing from which entrainevapor passing'through the pipe, h, from the main condenser, d, the vapor being; thereafter passed into an augmentorcondenser, j,

from whence it is sucked through a pipe, is,

by the wet air pumps,

In order to prm'ideit'or the proper drain age oi the exhaust chamber, a, of the turbine, Z), the Wet air pumps, f, are connected to the chamber, a, by a drainage pipe, m,

having a suitable Water seal such a pipe bend o for the purpose oi. preventing the vapor in the chamber, a, passing directly to the pumps, f, which are placed at a level indicated by the line a, n, which slightly lower' than the level, 7), of the tlnibine blades",thedifference oi level 92 1), being utilized to cause the water of condensation formed in the turbine casing to low down the pipe connection-11 leading to the Wet air pump suction pipe. in 'such an arrange ment it has been found that an increased degree of vacuum produced-in the main condenser (Z and turbine exhaust chamber.

(1., causes the water of condensation inlhe turbine exhaust chamber, 1., to rise to an undesirable height therein and oven touch the rows of turbine blades, this being espe: cially noticeable when the .llill'crencc oit' 'levels,' 1L,' 1), between the lurbine and the pump inlet valves is made as small as possible for the sake of economizing space. According to the present invention however this ditlicullyis overcome by placing a pipe 7 connection, 1 between the inletpipe, 7r, of. similar to that'shown in Fig; l; i the uugmentor, and the. suction -pipe, -c,'or'

'- pump suction pipe, 6, being at the same level, '1', a, as that to which it is deemed advisable to allow the water of condensation to rise within the exhaust chamber, a, of the turbine.

On account of the head of liquid in the conduit, 6, being thus limited, an increased degree of vacuum in the chamber, a, causes the wet air pumps to operate at a lower pressure, such head being thus always capable of overcoming the resistance to opening of the wet air pump valves. If, however,

the liquid in the conduit, 6, overflows into the augmentor, j, the latter discharges less vapor while the discharged liquid isnow at a temperature at which the liquid can be more readily handled by the wet air pumps. A high degree of vacuum is therefore maintained in the turbine chamber, a, without giving rise vto the previous mentioned disadvantage.

Obviously this invention may be applied to other arrangements by which a high-degreeof vacuum is obtained. Thus instead of using a vacuum augmentor of the Farsonss type, one or more air pumps, 8, as shown in Fig. 2 may be used for the purpose of increasing the vacuum in'the main condenser, d. In such a case, however, the water: and vapor discharged from the augmentor pumps, 8, are passed directlyto the atmosphere, boiler feeding pump or hot well, though the inlet side of the augmentor pumps, 8, is connected to the suction pipe, 6, of the wet air pumps, 1, by a pipe connection, in the above described manner. Further, if desired, instead of providing two separate pipe connections, e and h, between the main condenser and pump suction pipe and augmentor respectively, both the water and vapor in the main condenser are conducted by a single pipe connection to the pump suction-pipe, the augmentor then being connected to the single pipe connection .at a point' therein at the requisite height above the pump inlet valves. Such an arrangement is shown in Figs. 3 and t in which, it indicates the pipe connection conduc ing water and vapor to the inlet of the wet air pumps A pipe, u, branches from the pipe I; to the vacuum augmentor means, which, in Fig. 3 are shown as dry air pumps, 8, and in Fig. 4 as an ejector, g, and augmentor condenser, j, The height at which the pipes, ,t and to meet, is, as before, controlled by the maximum height, 7", 1*, of condensation water to be permitted in the exhaust chamber, a, of the turbine.

the arrangement then becomes one in which the suction spaces of the vtwo pumps are common but'thevalves of the dry air-pump or pumps, .9, stand a prescribed distance above those of the other for the purpose described.

It will beseen that-by this invention the;

level of the inlet valves of the wet air pump or pumps, f below the turbine, b, is reduced to a minimum and need therefore be made only sufiicient to insure theproper drainage of the turbine exhaust chamber, a, since the water of condensation therein, cannot possiblygrise to an undesirable height.

In ship installations especially, the reduc-" tion thus effected in the space occupiedby the condensing plant, is of great importance. Further, the invention is applicable to turbine installations having more than one lowpressure turbine and also to steam engine or bther installations where a high degree-cf vacuum is required.

It will be seen that the method of carry ing the invention into efie'ct is" capable of manymodificat-ions' in the structural details and arrangement of the plant without in v any way invention.

Having now described our invention what we claim as new and desire to secure by Letters Patent is 1. An apparatus for obtaining a high degree of vacuum, comprisin in combination a motor, a condenser receivmgthe fluid dis charged from said'motor, exhausting means,

departing from the spirit of the a pipe connection between the condenser and the exhausting means, a drainage pipe connection from the motor to the exhausting means, and augmentor means having a connection to the connection between the condenser and exhausting means, said connection being made at the level to which condensed fluid is permitted to rise within'the motor.

2. An apparatus for obtaining a high degree of vacuum, comprising in combination l a motor, acondenser receiving the fluid discharged from the motor, exhausting means,

apipe connection between the condenser and the exhausting means, a drainage pipe connection from the motor to the exhausting means, augmentor means, a pipe connection between said augmentor means and the condenser and an overflow pipe connection between the latter connection and that between the condenser and exhausting means,

a said overflow connection being connected to the exhausting means pipe connection at the level to which condensed fiuid is per: mitted to rise within the motor.

3. An apparatus for obtaining a high .de-

gree of vacuum, comprisingin combination a motor, a condenser receiv ng thefluid dis 13a the wet air pumps, said overflow pipe con- 10 nection being connected to the wet air pump pipe connection the level towhich condensed fluid is permitted to rise within the motor.

In testimony whereof, we aiiix oursigna 'turesin presence of two witnesses.

CHARLES ALGERNON PARSONS. STANLEY SMITH COOK Witnesses V. H. PiLMsUR, FREDRIGH GORDON HAY BEDFORD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

